Anchor project-only patterns in .mcpbignore#4
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mgoldsborough merged 1 commit intomainfrom Apr 24, 2026
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Unanchored gitignore patterns (no leading `/`) in .mcpbignore match anywhere in the tree — including inside vendored `deps/` (Python) or `node_modules/` (Node). mcpb pack then strips legitimate runtime files from bundled packages, which can break imports when the bundle starts. The trap fired on synapse-research 0.1.1 and openweathermap 0.4.0: an unanchored `conftest.py` pattern stripped `deps/beartype/_conf/ conftest.py` (a real runtime module, not a pytest config), and the bundle failed with `MCP error -32000: Connection closed`. Fix: anchor project-only patterns with a leading `/`, keep cross-tree hygiene (`__pycache__/`, `*.pyc`, `.DS_Store`) unanchored, and drop the redundant `conftest.py` rule (pytest configs already live under `/tests/`). No behavior change for the currently-published artifact; this is preventive — the next release will produce a bundle that keeps vendored deps intact.
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Summary
Unanchored gitignore patterns in
.mcpbignorematch anywhere in the tree, including inside vendoreddeps/ornode_modules/.mcpb packthen strips legitimate runtime files from bundled packages.The trap fired on synapse-research 0.1.1 and openweathermap 0.4.0 — an unanchored
conftest.pypattern strippeddeps/beartype/_conf/conftest.py(a real runtime module), breaking the FastMCP import chain and crashing the MCP subprocess withMCP error -32000: Connection closed.This PR anchors project-only patterns with a leading
/, leaves cross-tree hygiene (__pycache__/,*.pyc,.DS_Store) unanchored, and drops the redundantconftest.pyrule (already covered by/tests/).No behavior change for the currently-published artifact — this is preventive. The next release from this repo will produce a bundle that keeps vendored deps intact.
Matches the canonical
.mcpbignoreshape inmcp-server-template-pythonandmcp-server-template-typescript.Test plan
make bundle(or equivalent) and confirm no regressions in the packaged output